Handle dives without samples correctly

The code in commit f99e1b476b18 "Trim the dive to exclude surface time at
beginning and end" failed rather badly if a dive has no samples at all -
which is true for many of our test dives.

This makes sure that we don't exclude data points if we never set up start
and end times.

Reported-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/profile.c b/profile.c
index d4369d97f..a8bda4672 100644
--- a/profile.c
+++ b/profile.c
@@ -1706,7 +1706,8 @@ static struct plot_info *create_plot_info(struct dive *dive, int nr_samples, str
 		int delay = 0;
 		struct sample *sample = dive_sample+i;
 
-		if (sample->time.seconds < dive->start || sample->time.seconds > dive->end) {
+		if ((dive->start > -1 && sample->time.seconds < dive->start) ||
+		    (dive->end > -1 && sample->time.seconds > dive->end)) {
 			pi_idx--;
 			continue;
 		}